--/1 Question 4 Select the option that is grammatical below. Although the letter was written on April 15, 2014, it was not delivered until June 30, 2018, Although the letter was written on April 15th 2014 it was not delivered until June 30th 2018. Although the letter was written on April 15, 2014 it was not delivered until June 30, 2018 Although the letter was written on April 15 2014 it was not delivered until June 30 2018